A gravity separation wind tunnel free flight test device

Abstract

The present invention provides a gravity separation wind tunnel free-flight test device, which relates to the field of wind tunnel test model support and deployment technology, including: a carrier aircraft, with a separation chamber at the bottom, and a movable portion provided in the separation chamber; a separation object, located in the separation chamber and detachably engaged with the movable portion; and a separation control device, located in the separation chamber, for controlling the movable portion to disengage from the separation object, causing the separation object to fall. The present invention utilizes aerodynamic force and the gravity of the separation object to ensure that the initial separation velocity of the separation object is zero, meeting the requirements of wind tunnel free-flight tests for large-mass separation objects. Furthermore, the present invention has a simple structure and high reliability, and the separation of the separation object can be controlled simply by controlling the movement of the movable portion, making operation very convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of wind tunnel test model support and launch, in particular to a gravity separation wind tunnel free flight test device. Background Art

[0002] Release and separation tests are specialized wind tunnel tests, and aircraft-based release of separated objects is a common test. During release, large masses separate. In these tests, the separated objects have no separation velocity, relying solely on gravity and aerodynamic forces for initial separation. Traditionally, releases have typically involved high separation velocities. Therefore, to achieve a certain separation velocity, the separation mechanism was often designed as a catapult with a specific stroke.

[0003] However, this separation mechanism is not suitable for gravity separation (because it is difficult to give initial velocity to large-mass separation objects), and it is necessary to redesign a separation device suitable for zero initial velocity. Summary of the Invention

[0004] The purpose of the present invention is to provide a gravity separation wind tunnel free flight test device that can separate the separated objects fixed in the carrier at zero initial velocity, ensuring that the separated objects are separated completely by aerodynamic force and gravity;

[0005] The present invention provides a gravity separation wind tunnel free flight test device, comprising: a carrier aircraft, a separation chamber provided at the bottom, a movable part provided in the separation chamber; a separation object provided in the separation chamber and detachably engaged with the movable part; a separation control device located in the separation chamber and used to control the movable part to disengage from the separation object and cause the separation object to fall.

[0006] Furthermore, a limiting portion is provided in the separation bin for limiting the separation object from moving along with the movable portion.

[0007] Furthermore, a connecting column is provided on the separator, and the limiting portion is a carrier hole provided on the bottom wall of the separation bin, and the connecting column passes through the carrier hole and is engaged with the movable portion.

[0008] Furthermore, the movable part includes a movable block, which is provided with a connecting hole for inserting the connecting column, an arc-shaped interlocking flange is provided on the inner wall of the connecting hole, and an annular interlocking groove is provided on the connecting column, and the arc-shaped interlocking flange can be embedded in or out of the annular interlocking groove.

[0009] Furthermore, the connecting hole is an elongated hole, and the arc-shaped engaging flange is located on an inner wall at one end in the longitudinal direction of the connecting hole.

[0010] Furthermore, a sliding groove is provided on the movable block, a guide pin is fixedly provided on the bottom wall of the separation bin, and the sliding groove slides on the guide pin.

[0011] Furthermore, a limiting block is provided on the bottom wall of the separation bin, for limiting the moving distance of the movable block in the direction of separating from the connecting column.

[0012] Furthermore, the separation control device includes a pull rope, which is connected to the movable part and is used to pull the movable part to move in a direction away from the separation object.

[0013] Furthermore, it also includes a connection maintaining device for maintaining the engagement connection between the movable portion and the separator.

[0014] Furthermore, the connection and maintaining device is a tension spring, which is connected to the movable part and is used to pull the movable part to move in a direction of maintaining engagement with the separator.

[0015] The beneficial effect of the technical solution of the present invention is that by utilizing aerodynamic forces and the gravity of the separated material, the initial separation velocity of the separated material is guaranteed to be zero, meeting the requirements of wind tunnel free flight tests for large-mass separated materials. It also has a simple structure and high reliability. The separation of the separated material can be controlled simply by controlling the movement of the movable part, making it very convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 Schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the present invention from another perspective;

[0020] Figure 4 This is a schematic diagram of the movable block action mode of the present invention;

[0021] Figure 5 Schematic diagram of various fixing parts on the carrier of the present invention;

[0022] Figure 6 Schematic diagram of the isolate of the present invention;

[0023] Figure 7This is a schematic diagram of the separation connection column of the present invention;

[0024] Figure 8 It is a schematic diagram of the movable block of the present invention;

[0025] Figure 9 It is a cross-sectional view of the movable block of the present invention;

[0026] Figure 10 Schematic diagram of the chimeric combination of the isolate and the live block of the present invention;

[0027] Figure 11 This is a schematic diagram of the separation of the separator and the live block of the present invention;

[0028] Description of reference numerals:

[0029] 1-carrier, 101-separation chamber, 102-guide pin, 103-limiting block, 104-carrier cover, 105-tension spring fixing bolt;

[0030] 2-separator, 201-connecting column, 202-annular fitting groove;

[0031] 3-separation control device, 301-pull rope, 302-pull rope ring;

[0032] 4-movable part, 401-movable block, 402-connecting hole, 403-arc-shaped fitting flange, 404-slide groove, 405-tension spring fixing hole, 406-pull rope fixing hole;

[0033] 5-limiting part, 501-carrier hole;

[0034] 6-connection holding device, 601-tension spring; DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] Example 1

[0039] like Figure 1-Figure 3 As shown, the present invention provides a gravity separation wind tunnel free flight test device, comprising: a carrier aircraft 1, with a separation chamber 101 at the bottom, and a movable portion 4 provided in the separation chamber 101; a separation object 2, arranged in the separation chamber 101 and separably engaged with the movable portion 4; a separation control device 3, located in the separation chamber 101, for controlling the movable portion 4 to disengage from the separation object 2 and causing the separation object 2 to fall.

[0040] Specifically, the carrier 1 is provided with a detachable carrier cover 104. When the carrier cover 104 is removed, the separation chamber 101 can be operated, for example, the movable part 4, the separation control device 3 and other components can be installed. The movable part 4 can move along a certain directional track in the separation chamber 101. The separated object 2 is suspended at the bottom of the carrier 1 in a manner of being interlocked with the movable part 4. When the movable part 4 is in the initial state, it forms an interlocking connection with the separated object 2, so that the separated object 2 will not fall. When the movable part 4 is moved, the interlocking relationship between it and the separated object 2 is broken, so that the separated object 2 falls at zero initial speed under the action of gravity, thereby achieving separation.

[0041] Example 2

[0042] This embodiment 2 specifically describes the limiting portion 5.

[0043] like Figure 3 、 Figure 10 and Figure 11 As shown, a limiting portion 5 is further provided in the separation chamber 101 for limiting the separation object 2 from moving along with the movable portion 4 .

[0044] Specifically, in this device, the movable portion 4 and the object 2 are initially engaged and then separated by movement. Furthermore, the object 2 is generally large, so the static friction between the object 2 and the movable portion 4 is relatively high. When the movable portion 4 moves, it may carry the object 2 with it, causing separation failure. Therefore, in this embodiment 2, a stopper 5 is used to restrain the object 2, preventing it from moving with the movable portion 4 and ensuring separation effectiveness.

[0045] Example 3

[0046] This embodiment 3 specifically describes the structures of the movable portion 4 and the limiting portion 5.

[0047] like Figure 4-11 As shown, the separator 2 is provided with a connecting post 201, and the limiting portion 5 is a carrier hole 501 provided on the bottom wall of the separation chamber 101. The connecting post 201 passes through the carrier hole 501 and is engaged with the movable portion 4. The movable portion 4 includes a movable block 401, which is provided with a connecting hole 402 for inserting the connecting post 201. The inner wall of the connecting hole 402 is provided with an arcuate engaging flange 403. The connecting post 201 is provided with an annular engaging groove 202, and the arcuate engaging flange 403 can be inserted into and out of the annular engaging groove 202. The connecting hole 402 is an elongated hole, and the arcuate engaging flange 403 is located on the inner wall of one end of the connecting hole 402 in the longitudinal direction. The movable block 401 is provided with a slide groove 404, and a guide pin 102 is fixedly provided on the bottom wall of the separation chamber 101. The slide groove 404 slides over the guide pin 102. A limiting block 103 is provided on the bottom wall of the separation chamber 101 for limiting the movement distance of the movable block 401 in the direction of separating from the connecting column 201 .

[0048] Specifically, there are two guide rail grooves 404 on both sides of the movable block 401, and multiple guide rail guide pins 102 are screwed on the carrier 1 (on the bottom wall of the separation bin 101), which can ensure that the movable block 401 slides back and forth. There is a limit block 103 behind the movable block 401. The limit position of the movable block 401 sliding in the direction of engagement with the separated object 2 is constrained by the guide pin 102, and the limit position of the movable block 401 sliding in the direction of disengagement from the separated object 2 is constrained by the limit block 103, so as to prevent the movable block 401 from moving excessively and being unable to return to the correct position for the next separation work. The top of the separator 2 has two connecting posts 201 extending in the height direction. These posts 201 are radially defined by a circle of annular interlocking grooves 202. Connecting holes 402 are provided on the movable block 401 at positions corresponding to the two connecting posts 201. These holes are equipped with arcuate interlocking flanges 403. When the two arcuate interlocking flanges 403 engage with the two annular interlocking grooves 202, the separator 2 is suspended on the movable block 401. When the movable block 401 is moved, allowing the two arcuate interlocking flanges 403 to separate from the two annular interlocking grooves 202, the separator 2 loses its interlocking relationship with the movable block 401, and the separator 2 falls under the action of gravity. The connecting holes 402 are designed as elongated holes, providing effective clearance for the connecting posts 201 to move within them. The connecting post 201 is inserted into the connecting hole 402 through the carrier hole 501. Due to the limitation of the carrier hole 501, the movable block 401 will not carry the separation object 2 with it during its movement, so that the separation object 2 and the movable block 401 are effectively separated.

[0049] Example 4

[0050] This embodiment 4 specifically describes the separation control method for the separated substance 2.

[0051] like Figures 1-11 As shown, the separation control device 3 includes a pull rope 301 connected to the movable portion 4 for pulling the movable portion 4 in a direction away from the separation object 2. It also includes a connection and maintenance device 6 for maintaining the engagement between the movable portion 4 and the separation object 2. The connection and maintenance device 6 is a tension spring 601 connected to the movable portion 4 for pulling the movable portion 4 in a direction to maintain engagement with the separation object 2.

[0052] Specifically, in this device, the pull cord 301 pulls the movable block 401 in the direction of separation from the object 2, allowing the object 2 and the movable block 401 to be disengaged. In particular, to prevent the movable block 401 from accidentally moving when the pull cord 301 is not pulled, or the movable block 401 from being able to return to its original position and insert into the arc-shaped interlocking groove after the connecting column 201 is inserted into the connecting hole 402, this embodiment 4 is provided with a pull spring 601, which is located on the side opposite to the pull cord 301 and applies a force in the opposite direction to the pull cord 301 to the movable block 401, causing the movable block 401 to move in the direction of interlocking with the object 2, thereby ensuring the interlocking relationship between the movable block 401 and the object 2. When separation is required, the force of the pull cord 301 is simply pulled to overcome the tension of the pull spring 601, and the movable block 401 can be pulled out of the interlocking relationship with the object 2.

[0053] Specifically, a bolt 105 for the tension spring 601 is provided within the separation chamber 101, and a hole 405 for the tension spring 601 is provided on the movable block 401. The ends of the tension spring 601 are fixed to the bolt 105 and hole 405, respectively, thereby causing the tension spring 601 to pull the movable block 401. A drawstring hole 406 is also provided on the movable block 401, and a drawstring ring 302 is provided on the drawstring 301. The drawstring ring 302 interlocks with the drawstring hole 406, connecting the drawstring 301 to the movable block 401. The drawstring hole 405 and the drawstring hole 406 are located at opposite ends of the movable block 401 in the corresponding direction of movement.

[0054] How this device works:

[0055] Before the test begins, pull spring 601 is inserted into tension spring 601 fixing hole 405 and tension spring 601 fixing bolt 105. Using guide pin 102, loose block 401 is installed in separation chamber 101 of carrier 1. Drawstring 301 is connected. Connecting post 201 is inserted through carrier hole 501 into connecting hole 402. The arcuate fitting flange 403 engages with the annular fitting groove 202, securing object 2. Due to the tension of pull spring 601, object 2 is self-locking.

[0056] During the test, the pull cord 301 is pulled firmly, causing the movable block 401 to move in the disengagement direction, overcoming the tension of the pull spring 601. This causes the arcuate engagement flange 403 to disengage from the annular engagement groove 202, thereby releasing the object 2. Under the influence of its own gravity and aerodynamic forces, the object 2 begins to separate at zero speed, that is, it separates entirely under its own gravity, thus achieving the test objective.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gravity separation wind tunnel free flight test device, characterized in that: include: The carrier has a separation compartment at the bottom, and a movable part is provided in the separation compartment; a separator, disposed in the separation chamber and detachably connected to the movable portion; a separation control device, located in the separation chamber, for controlling the movable portion to disengage from the separation object, so that the separation object falls; A limiting portion is further provided in the separation chamber to limit the separation object from moving along with the movable portion; The separator is provided with a connecting column, the limiting portion is a carrier hole provided on the bottom wall of the separation chamber, and the connecting column passes through the carrier hole and is engaged with the movable portion; The movable part includes a movable block, a connecting hole for inserting the connecting column is provided on the movable block, an arc-shaped fitting flange is provided on the inner wall of the connecting hole, and an annular fitting groove is provided on the connecting column, and the arc-shaped fitting flange can be inserted into or out of the annular fitting groove; A sliding groove is provided on the movable block, a guide pin is fixed on the bottom wall of the separation bin, and the sliding groove slides on the guide pin; A limit block is provided on the bottom wall of the separation bin, for limiting the moving distance of the movable block in the direction of separating from the connecting column; It also includes a connection maintaining device for maintaining the engagement connection between the movable portion and the separator.

2. The gravity separation wind tunnel free flight test device according to claim 1, characterized in that: The connecting hole is a long strip-shaped hole, and the arc-shaped engaging flange is located on the inner wall of one end of the connecting hole in the longitudinal direction.

3. The gravity separation wind tunnel free flight test device according to claim 1, characterized in that: The separation control device includes a pull rope, which is connected to the movable part and is used to pull the movable part to move in a direction of separating from the separation object.

4. The gravity separation wind tunnel free flight test device according to claim 3, characterized in that: The connection and maintaining device is a tension spring, which is connected to the movable part and is used to pull the movable part to move in a direction of maintaining engagement with the separator.

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